Playing open chords for beginners

If you are a complete beginner this will be a great lesson for you because you are going to learn two of the chords that you will need to know in order to play “Knockin’ On Heaven’s Door”. Those two chords are G major and D major. Both of these chords are “open” chords. Open chords simply refer to chords that are played mostly on the first three frets of the guitar and have at least one open string ringing out when the chord is strummed.